Finding the Fourth Proportional to 1,618.50, 2,232.73 and 1,020.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.50 : 2,232.73 = 1,020.72 : x
2. Step 2: Convert to fraction form
   1,618.50/2,232.73 = 1,020.72/x
3. Step 3: Cross multiply
   1,618.50x = 2,232.73 × 1,020.72
4. Step 4: Simplify right side
   1,618.50x = 2,278,992.17
5. Step 5: Solve for x
   x = 2,278,992.17/1,618.50
6. Step 6: Final answer
   x = 1,408.09